how to solve canon ir 5065 cassette 3 and 4 problem

When the cassette is pushed into the machine, the cassette open/closed sensor goes on and, at the same time, the pickup roller starts to move down. At this time, the light-blocking plate leaves the lifter sensor, causing the cassette lifter motor to go on and the lifter to move up. When the lifter moves up and the lifter sensor detects the surface of paper, its ascent stops.
When the open button of the cassette is pressed, the drive gear of the lifter becomes disengaged, letting the lifter to move down under its own weight.

COPIER > FUNCTION>PART-CHK codes #'s in red
MOTOR=MTR Use it to select the motor whose operation you want to check. (range: 1 to 30)
Procedure
1) Select the item, and press the OK key so that the motor will repeatedly go on and off as follows: for 0.5 sec, on for 10 sec, off  for 0.5 sec, on  for 10 sec, off  for 0.5 sec, on off.
7 = cassette 3/4 pickup motor (M12)

Solenoid=SL-ON Use it to start the operation of the solenoid.
1) Select the item, and press the OK key so that the solenoid will repeatedly go on and off as follows: for 0.5 sec, on for 10 sec, off - for 0.5 sec, on  for 10 sec, off  for 0.5 sec, on  off

3 = cassette 3 pickup solenoid (SL3)
4 = cassette 4 pickup solenoid (SL4)

also check signals in I/O mode=P-CON
P001=BIT
3 /cassette 3 paper sensor signal-1: paper present
5 /cassette 4 paper sensor signal-1: paper present
P002=BIT
0 /cassette 3 retry sensor signal 1: paper present
1 /cassette 4 retry sensor signal 1: paper present
P008=BIT
5 /cassette 3 paper level sensor signal 1: paper present
6 /cassette 4 paper level sensor signal 1: paper present
8 /cassette 3 open/closed sensor signal 0: open
9 /cassette 4 open/closed sensor signal 0: open
P009=BIT
5 /cassette 3 solenoid ON signal 1:ON
6 /cassette 4 solenoid ON signal 1:ON

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